Adding Three 2-Digit Numbers
Adding Three 2-Digit Numbers: Learn
How to add three 2-digit numbers (for example 45 + 82 + 67).
Place the numbers in a column so that the tens' place digits and ones'
place digits are lined up. Draw a line under the bottom number.
4 5 8 2 + 6 7
Add the three ones' place digits. (5 + 2 + 7 = 14). This sum is a
two-digit number, so place a one above the tens' place column and
place the four below the line in the ones' place column.
1 4 5 8 2 + 6 7 4
Add the numbers in the tens' place column (1 + 4 + 8 + 6 = 19) and place
the answer below the line and to the left of the ones' place sum
1 4 5 8 2 + 6 7 1 9 4
(If the sum of the ones' place digits is less than ten no number is placed above the tens' place column.)
Adding Two-Digit Numbers: Practice
What is the Sum of the three Numbers?
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Math Lessons by Grade
- Estimation and Mental Math
- Naming Numbers
- Percents and Ratios
- Place Value